Banker



- 6. F. FLETCHER.

BANKER. APPLICATION mzprn. 3. 1920.

Patented Mar. 14,1922.

'be operated upon is line 22 of Fig. 1;

GILBERT I. FLETCHER, 0F BANGOR, MAINE.

BANKER.

To all whom it may concern:

Be it known that I, GILBERT F FLETCHER, a citizen of the United of Bangor, in the county of Penobscot and State of Maine, have invented certain new and useful Improvements in Bankers, of which the following is a specification.

y invention relates to bankers, and is designed to improve means for supporting the material from which monuments, statues and the like are fashioned.

It is usual in monumental work to have a support upon which the stone or material to placed, and means is provided for raising or lowering said support to position it so that it may be operated upon by the monumental worker more easily. 7 7

It is one of the objects of my invention to provide a support of this sort, which can be easily and quickly raised to the desired height and thereafter secured in such adj usted position,

but allowing the support to be rotated to eliminate the necessity of the operator changing the position at which he is working. This feature is very important, as it is ofttimes necessary to work from one particular point in order that proper light may be thrown upon the work.

With my invention these features have been accomplished, as I provide a support which may be quickly and with a small amount of effort raised to and thereupon secured. In its adjusted positions, my support is adapted to be rotated by the operator so that the work may be turned as the operator desires. With these and other features in mind, I will more specifically describe and point out the essential details of my invention in the specification, and in drawings, in which,

Fig. 1 is a sectional view of my device, with certain parts in elevation;

Fig. 2 is a transverse sectional view on and Fig. 3 is fragmentary'view of a modified form of my device. A p

In the drawings, referring more particularly to Fig. 1, numeral 1 indicates the flooring upon which my device is Secured, and 2 the wall thereof. The work is adapted to be supportedupon a table 3, rigidly secured to a standard 4. This standard 4 is here' h shown in the form of a piston rod, having Specification of Letters Patent. Application filed February a, 1920. Serial States, and resident any desired height Patented Mar. 14, 1922. N0. 356,057.

secured at its lower end a piston head 5.

I provide a piston cylinder 6, in which said head 5 and rod 4 are adapted to work.

In this form of the device I prefer to use fluid pressure means for raising the table 3, and in carrying out this feature of my invention I provide a pipe 7, secured to the wall 2 adjacent the support in any suitable manner. To this pipe the source of fluid pressure (not shown) may be connected. A control valve 8 controls the admission of the fluid pressure to the pipe 7. I he pipe 7 extends beneath the flooring 1 and into the box-like compartment 9, which encloses the piston cylinder 6 and the air pressure connections thereto. The fluid pressure pipe 7 terminates immediately adjacent the lower end of the cylinder 6 and is connected to a Tcoupling 10. A short pipe 11 extends from one side of this T-coupling 10 and connects the source of fluid pressure to the lower end of the cylinder 6. A valve 12 is connected to the lower end of the T- coupling 10 for the purpose of discharging any collection of sediment or foreign matter which may collect in the lower end of the cylinder 6.

A vent port 13 is positioned at the top of the cylinder 6. This vent port is always open, allowing communication between the inside of. the cylinder 6 and the atmosphere.

he purpose of this vent will be readily seen, as it is necessary to allow the escape of the air in the upper portion of the cylinder 6 when the piston head 5 is raised, and also, it is necessary to break the vacuum, which will. occur in the upper portion of the cylinder 6 when the piston head 5 is lowered.

I wish to provide an exhaust valve 14 in the pipe 7 between the control valve 8 and the cylinder 6, for the purpose of exhausting the air beneath the piston head 5 when it is desired to lower the support 3. It is obvious that this valve 14, together with the valve 8, may be put at any desired place, but I preferably place them in the position shown in Fig. 1 of the drawings, so that they may be conveniently operated.

It is obvious from the foregoing description that when I desire to raise the support 3, it is'merely necessary for me to admit fluid pressure to the pipe 7 by means of the valve'8, which fluid pressure, operating upon t e piston head 5, raises the support 3. When the desired height has been reached 1 'has been clamped to and the collar wish to secure the support in its adjusted position without relying upon the fluid pressure. To accomplish this purpose I have provided a split collar 15, which encircles the standard at and is secured in position by bolts and nuts 16.

In order to provide a hearing for this collar 15 I use a bushing 17, which surrounds the support 1 and rests upon the floor 1. This bushing member is shaped to form a bearing rim 18, upon which the split collar 15 is adapted to rest.. When the collar 15 the standard 4 it will support the weight of the monument or work operated upon, such'weight being supported directly upon the rim 18. It is therefore, obvious that the standard el may be rotated 15 will bear upon the rim 18 and support the standard thereby.

For the .purpose of gaining access to the compartment 9, Ipro'vide an opening 19 through which the operator may reach to control the valve 12 when it is desired to discharge sediment, etc, from the lower end of the cylinder 6.

Referring now more particularly to the modified form of my device, shown in Fig, 3, it will be seen that the standard is in the form of a screw-threaded shank 20, supported in an internally-threaded sleeve 21. This sleeve 21 is formed integrally with a collar member 22. This collar member is secured to the floor 1 by means of bolt and butts 23. The work is supported upon a turn-table 24 adapted to revolve upon the supporting plate 25,-rigidly secured to the upper end of the standard 20. Handles 26 are provided for rotating the plate 25, and consequently the standard 20, to raise or lower the support to any desired position.

In order to provide means for securing. the standard 20 in any of its adjusted positions, I provide by a handle member 28, which has a swivel a set screw 27 controlled connection 29 with the set screw 27 By this it is apparent that the set screw 27 may be operated from a distance to eliminate the necessity of stooping under the table 24 to operate this-set screw. 7

Thus, it will be seen that with this form of {my device when it is desired to raise the work supported by the turn-table 24, it is only "necessary to grasp the rotate the standard 20, which, by reason of its screw-threaded connections :wi'th sleeve '21.

I will be slowly raised. When the desired height has been reached, the set screw v2'7 may be adjusted by the handle 28 to bind the standard 20 and thereby hold it rigidly As 'hereinbefore -mentioned, the table 2% is of any ordinary I turn-table construction,

and therefore, when it is desired to rotate thework, this i may be-easily done bymerely graspmg the work and turning it to the desired position,

provided a support which embodies all of character.

that the work of various changes and modifications and under said handles 26 and upon said supporting rim, as and for the 7 said table and projecting through said floor,

head works the plate-like support 25, which is rigid with the standard 20, of course remaining stati'on'ary.

From the foregoing it is seen that I have the desired features for a device of this The block of granite or work to be operated upon may be placed upon the supporting table and the table raised to any desired height. The standardthen, upon which the table is mounted, may be locked in its adjusted position to more thoroughly insure the stability ofthe device, and thereafter any rotary adjustments which the operator may desire may be made by reason of the oscillating connection between the standard and the bushing inthe preferred form, and the turn-table anditssupport in the modified form. In lowering the work, in the preferred embodiment of my invention, it is necessary, first, to loosen the split collar 15 andthen operate the-valve 14 to allow the escape of the air, or other fluid pressure from the lower end'of the cylinder '6. By doing this it1willbe seen its own weight will force the piston to its lowermost position-injhe cylinder; L

In the modification the: process of lower-V ing is slightly different. The. set screw 27 is first loosened and then, by rotating ,the standard 20, it may be lowered toanyposition; j V

I have described and shown two forms of myinventiombut it will be apparent that from the specific structure-may be resorted to without departing invention.

Having thus describedmy invention, what Iclaim-is: 3 '1. In a device ofthe class described, a work supporting table, astandard rigidly secured thereto, a piston head on said stand; 7

ar d, a cylinder means'for" admitting fluid pressure to the lower end of said cylinder piston head for raising said table a flooring for supporting said device,

'a bushing adapted tofo'rm bearing.- rim 'secured to' said flooring,

a split. collar encircling said standard and adapted to be clamped upon 's'aidistandard to support the table in its adjustedposi-tions- -and' bearing purpose set forth. a I

2. :Ina banker of the class described the combination with a floorof'a work supporting table adapted'to bejmove'dfito afpoint adjacent the floor, a standard secured to a piston headon said standard anda cylinder beneath jsaid-floor inrwh-ich said'piston for elevating; said table, a bear; ing rim secured tothe topside of said; floor and means adjustable on said standard and 1 from the spirit andscope of my 7 co-operating with the bearing rim to retain the table in its elevated positions. 3. In a banker of the class described the combination with a floor of a Work supporting table adapted to be moved to a point adjacent the floor, a standard secured to said table and projecting through said floor, a piston head on said standard and a cylinder beneath said floor in which said piston head Works for elevating said table, a bearing rim secured to the top side of said floor through which said standard projects, and a split collar encircling the standard and adapted to be clamped thereon to retain the table in its adjusted positions by abutting the hearing rim, substantially as described.

4:. In a banker of the class described the combination with a floor of a Work supporting table adapted to be moved to a point adjacent the floor, a standard rigidly secured to said table and projecting through said floor, a piston head on said standard, a cylinder beneath said floor in which said piston head WOIkS for elevating said table, means for admitting fluid pressure to said cylinder for raising said table, means for exhausting the air from said cylinder, a bearing rim secured to the top side of said floor through which said standard projects, and a split collar encircling the standard and adapted to be clamped thereon to retain the table in its adjusted position by abutting the bearing rim thereby enabling said standard and table to be revolved, as and for the purpose set forth.

GILBERT F. FLETCHER. 

